Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pontiac: 1991
1991 PontiacSECTION 1991
- 6000
- Bonneville V6-3800 3.8L
- Firebird
- Grand AM
- Grand Prix
- J2000/Sunbird
- Lemans FWD
- Trans Sport V6-191 3.1L
- 6000
- Bonneville
- Firebird
- Base, 2D Convertible, 3.1 T, 4L60/MD8
- Base, 2D Convertible, 3.1 T, 700R4/MD8
- Base, 2D Convertible, 5.0 E, Automatic, 4L60/MD8
- Base, 2D Convertible, 5.0 E, Automatic, 700R4/MD8
- Base, 2D Convertible, 5.0 E, Standard
- Base, 2D Coupe, 3.1 T, 4L60/MD8
- Base, 2D Coupe, 3.1 T, 700R4/MD8
- Base, 2D Coupe, 5.0 E, Automatic, 4L60/MD8
- Base, 2D Coupe, 5.0 E, Automatic, 700R4/MD8
- Base, 2D Coupe, 5.0 E, Standard
- Formula, 5.0 E, Automatic, 4L60/MD8
- Formula, 5.0 E, Automatic, 700R4/MD8
- Formula, 5.0 E, Standard
- Formula, 5.0 F, Automatic, 4L60/MD8
- Formula, 5.0 F, Automatic, 700R4/MD8
- Formula, 5.0 F, Standard, M39
- Formula, 5.0 F, Standard, MK6
- Formula, 5.7 8, 4L60/MD8
- Formula, 5.7 8, 700R4/MD8
- Trans Am GTA, 5.0 F, Automatic, 4L60/MD8
- Trans Am GTA, 5.0 F, Automatic, 700R4/MD8
- Trans Am GTA, 5.0 F, Standard, M39
- Trans Am GTA, 5.0 F, Standard, MK6
- Trans Am GTA, 5.7 8, 4L60/MD8
- Trans Am GTA, 5.7 8, 700R4/MD8
- Trans Am, 2D Convertible, Automatic, 4L60/MD8
- Trans Am, 2D Convertible, Automatic, 700R4/MD8
- Trans Am, 2D Convertible, Standard, M39
- Trans Am, 2D Convertible, Standard, MK6
- Trans Am, 2D Coupe, 5.0 F, Automatic, 4L60/MD8
- Trans Am, 2D Coupe, 5.0 F, Automatic, 700R4/MD8
- Trans Am, 2D Coupe, 5.0 F, Standard, M39
- Trans Am, 2D Coupe, 5.0 F, Standard, MK6
- Trans Am, 2D Coupe, 5.7 8, 4L60/MD8
- Trans Am, 2D Coupe, 5.7 8, 700R4/MD8
- Grand Am
- Base, 2D Coupe, Automatic, 125C/MD9
- Base, 2D Coupe, Automatic, 3T40/MD9
- Base, 2D Coupe, Standard
- Base, 4D Sedan, Automatic, 125C/MD9
- Base, 4D Sedan, Automatic, 3T40/MD9
- Base, 4D Sedan, Standard
- LE, 2D Coupe, 2.3 A
- LE, 2D Coupe, 2.3 D, 125C/MD9
- LE, 2D Coupe, 2.3 D, 3T40/MD9
- LE, 2D Coupe, 2.5 U, Automatic, 125C/MD9
- LE, 2D Coupe, 2.5 U, Automatic, 3T40/MD9
- LE, 2D Coupe, 2.5 U, Standard
- LE, 4D Sedan, 2.3 A
- LE, 4D Sedan, 2.3 D, 125C/MD9
- LE, 4D Sedan, 2.3 D, 3T40/MD9
- LE, 4D Sedan, 2.5 U, Automatic, 125C/MD9
- LE, 4D Sedan, 2.5 U, Automatic, 3T40/MD9
- LE, 4D Sedan, 2.5 U, Standard
- SE, 2D Coupe, 2.3 A
- SE, 2D Coupe, 2.3 D, 125C/MD9
- SE, 2D Coupe, 2.3 D, 3T40/MD9
- SE, 4D Sedan, 2.3 A
- SE, 4D Sedan, 2.3 D, 125C/MD9
- SE, 4D Sedan, 2.3 D, 3T40/MD9
- Grand Prix
- GT, 3.1 T
- GT, 3.4 X, Automatic
- GT, 3.4 X, Standard
- GTP
- LE, 2.3 D, 125C/MD9
- LE, 2.3 D, 3T40/MD9
- LE, 3.1 T
- SE, 2D Coupe, 2.3 D, 125C/MD9
- SE, 2D Coupe, 2.3 D, 3T40/MD9
- SE, 2D Coupe, 3.1 T
- SE, 2D Coupe, 3.4 X, Automatic
- SE, 2D Coupe, 3.4 X, Standard
- SE, 4D Sedan, 2.3 D, 125C/MD9
- SE, 4D Sedan, 2.3 D, 3T40/MD9
- SE, 4D Sedan, 3.1 T
- SE, 4D Sedan, 3.4 X
- STE, 3.1 T
- STE, 3.4 X, Automatic
- STE, 3.4 X, Standard
- LeMans
- Sunbird
- Base, 2D Coupe, Automatic, 125C/MD9
- Base, 2D Coupe, Automatic, 3T40/MD9
- Base, 2D Coupe, Standard
- Base, 4D Sedan, Automatic, 125C/MD9
- Base, 4D Sedan, Automatic, 3T40/MD9
- Base, 4D Sedan, Standard
- GT, Automatic, 125C/MD9
- GT, Automatic, 3T40/MD9
- GT, Standard
- LE, 2D Convertible, 2.0 K, Automatic, 125C/MD9
- LE, 2D Convertible, 2.0 K, Automatic, 3T40/MD9
- LE, 2D Convertible, 2.0 K, Standard
- LE, 2D Convertible, 3.1 T, Automatic, 125C/MD9
- LE, 2D Convertible, 3.1 T, Automatic, 3T40/MD9
- LE, 2D Convertible, 3.1 T, Standard
- LE, 2D Coupe, 2.0 K, Automatic, 125C/MD9
- LE, 2D Coupe, 2.0 K, Automatic, 3T40/MD9
- LE, 2D Coupe, 2.0 K, Standard
- LE, 2D Coupe, 3.1 T, Automatic, 125C/MD9
- LE, 2D Coupe, 3.1 T, Automatic, 3T40/MD9
- LE, 2D Coupe, 3.1 T, Standard
- LE, 4D Sedan, 2.0 K, Automatic, 125C/MD9
- LE, 4D Sedan, 2.0 K, Automatic, 3T40/MD9
- LE, 4D Sedan, 2.0 K, Standard
- LE, 4D Sedan, 3.1 T
- SE, 2.0 K, Automatic, 125C/MD9
- SE, 2.0 K, Automatic, 3T40/MD9
- SE, 2.0 K, Standard
- SE, 3.1 T, Automatic, 125C/MD9
- SE, 3.1 T, Automatic, 3T40/MD9
- SE, 3.1 T, Standard
- Trans Sport
Database: CHARM
CHARM manuals were retrieved from a set of DVDs released in late 2013. These manuals are usually the most detailed for the years in which they're available, but occasionally have missing or cut-off images.
Database: LEMON
LEMON manuals were retrieved in late 2025, so they have more up to date technical bulletins for example. However, they tend to be less detailed for older vehicles.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.